- #1
Hertz
- 180
- 8
Homework Statement
How much photon energy would be required to produce a proton-antiproton pair? Where could such a
high-energy photon come from?
Homework Equations
[itex]E^{2} = (pc)^{2} + (E_{0})^{2}[/itex]
The Attempt at a Solution
Since the photon is massless its energy is
[itex]E_{i}=pc[/itex]
The final energy is:
[itex]E_{f}^{2}=(pc)^{2}+(2m_{+}c^{2})^2[/itex]
and we know that energy and momentum are conserved, so:
[itex]E_{i}^{2}=E_{f}^{2}[/itex]
[itex](pc)^{2} = (pc)^{2}+(2m_{+}c^{2})^2[/itex]
but clearly, the mass of a photon is not zero, so how can this be?
edit-
Homework Statement
Homework Equations
The Attempt at a Solution
Please.. Can someone fix this? This gets added at the end of my post every time I preview post. It has been doing this for years...